Improvement in machines for punching metals



4 Sheets--Sheet I.

Improvement in Machines for Punchi Metal. No. 125,121. 3 PateApri|2,1872.

' 4 Sheets--Shet 2.

EDWARD CRADDOCK. Improvement in Machines for Punching Metal. 1 No.125,121. --PatentedApri|2,1872.

Witnes 45mm 'iam, 4

I 4 sheets s heet 3.

EDWARD CRADDOCK.

lmprovement'in Machines for Punching Metal. No. 125,121.PatentedApril2,li872.

v 4 Sheets --S heef 4.

EDWARD CRADDOCK;

improvement in Machines for Punching-Metal.

No. 125,121} Patented/\ mmsn;

Fey. 4.

UNITED STATES EDWARD GRADDOGK, OF LONDON,

ENGLAND, ASSIGNOR TO GEORGE AUGUSTUS THOMSON, OF UNIONTOWN,PENNSYLVANIA.

IMPROVEMENT IN MACHINES FOR PUNCHING METALS.

Specification forming part of Letters Patent No. 125,121, dated April 2,1872.

a SPECIFICATION or EDWARD MORADDOCK'.

Improved Portable Punch for Metals.

I, EDWARD GEADDooK, of the city of London, in the United Kingdom ofGreat Britain and Ireland, have invented an Improved Portable Punch forPunching Metals.

Nature and Objects of the Invention.

This portable punch is for the quick and accurate punching of holes ofany form in metals of every kind.

Itis made as follows: To a suitably-shaped body of m eta-1 are attachedtwo metallic arms, one of them being fixed to the upper part of thebody, or it may be cast or made of one piece with the body 5 and theother, which is movable, is secured to a quick-threaded screw passingthrough the center of the body of the apparatus, to the lower extremityof which screw a punch is firmly secured. At the outer end of each armis fitted a jaw or joint made capable of revolving, and in each jaw orjoint a stud or nut is placed, which is also made capable of revolving.A screw or circular piece of steel-onehalf of which is threaded as aright-hand screw and the other half as a left-hand screw-is passedthrough the studs, one end being so formed as to allow a handle or keyto be fitted thereon to operate the screw. On the screw being turned bythe handle or key the double action of the screw causes the movable armto approach to or recede from the other arm, and causes the punch to beforced down by means of the quick-threaded screw secured to the movablearm and to the punch itself, thereby causing the desired orifice orperforation to be made in the metal submitted to the operation. In thelower part of the body of the apparatus a space or cavity is formed toadmit the metal plate which is to be operated upon by the punch. In thelower part of this space is fitted a small bed or die, having a hole inthe center immediately under the punch,

are punched, drop down out of the way.

Description of the Accompanying Drawing.

Figure 1 is a plan, Fig. 2 a side elevation, Fig. 3 a front elevation,and Fig. 4 a section of the punch. v

a a is the metal body, to which are connected two metallic arms, b I),one of them, I), being fixed to the upper part of the body a; and theother, which is movable, secured to a quick-threaded screw, a, passingthrough the body a, at the lower extremity of which a screw-punch, d, isfirmly secured. At the outer end of each arm is fitted a jaw, c, capableof revolving, and in each jaw or joint a stud or nut. f, is placed,which is also capable of revolving. A screw, 9, one-half of which isthreaded as a right-hand and the other half as a left-hand screw, passesthrough. the studs ff, one end of the same being so formed as to allow ahandle or key, h, to be fitted thereon to operate the screw 9. In thelower part of the body a a space or cavity, t, is formed to admit themetal plate under the punch, and in the lower part of the space isfitted a small die or bed, j, having a slightly-tapering hole,

70, in the center and immediately under the punch d, through which holethe pieces of metal, as they are punched out, drop down out of the way.

Claim.

I claim as my invention- The improxed portable punch for punchingmetals, substantially as hereinbefore described and illustrated 011 theaccompanying sheet of drawing, and of which a working specimen or modelis herewith delivered, or any mere modification or imitation thereofacting in the same or a similar manner.

In witness whereof I, the said EDWARD I ORADDOOK, have hereunto set myhand this 31st day of December, in the year of our Lord one thousandeight hundred and seventy.

EDWARD ORADDOOK. Witnesses:

RoET. DE TEAoY GOULD,

4 Garden Court, Temple, London. ROBERT HowE GOULD, At the same address.

